Graphing Polar Equations
In This Chapter
Changing the mode and window of your calculator
Entering and graphing polar equations
Using Trace to evaluate polar equations
Viewing the table of a polar graph
Finding the derivative of polar equations
A polar coordinate system is used in Pre-calculus class as yet another way to define a point. Polar coordinates are of the form (r, θ). The distance from the pole (similar to the origin) is called, r. The polar axis is a ray that extends from the pole (similar to the positive x-axis). A positive angle is measured in a counterclockwise direction from the polar axis to a line that connects the pole and a point. See Figure 14-1 for a visual of a polar coordinate.
Figure 14-1: Polar coordinates.
Polar coordinates (r, θ) can be converted to rectangular coordinates (x, y), as discussed in Chapter 9. The purpose of this chapter is to explain ...